Stan Development Use this skill when working with Stan models for Bayesian inference and probabilistic programming, particularly when integrating with R (cmdstanr) or Python (cmdstanpy). Modern Stan Syntax Array Declarations (IMPORTANT) Use new array syntax introduced in Stan 2.26+: Why the change? - More consistent and readable - Clearer distinction between arrays and matrix/vector types - Aligns with modern Stan style Other Key Syntax Data types: Stan File Organization Standard Structure Modular Stan Code Main model includes functions: Benefits of modular approach: - Reusable functions acro…